Cooperative Transmission via Caching Helpers
IEEE Global Communications Conference(2015)
摘要
This paper models the cooperative transmission via caching helpers (cache-based joint transmission), which cache one of the K most popular files, in wireless cellular networks and analyzes its performance in terms of the file transmission success probability in the stochastic geometry framework. For given caching placement, the caching helpers can either provide a file diversity gain by serving different files or a cooperative gain by jointly transmitting the same files. In order to account for the tradeoff between the file diversity gain and the cooperative gain, we derive the cache hit probability and the rate coverage probability. We also find the optimal caching placement balancing the tradeoff and investigate the effects of various system parameters, such as the cooperative region, the density of caching helpers, and the file popularity exponent, on the optimal caching placement.
更多查看译文
关键词
cooperative transmission,caching helper,cache-based joint transmission,wireless cellular network,file transmission,stochastic geometry framework,cache hit probability,rate coverage probability,optimal caching placement balancing
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络